With Audi's new A4 generation having debuted in Frankfurt last week, Audiphiles' thoughts are now with the more sporting versions of Ingolstadt's bread-and-butter model. Motor Authority offers a spate of digitals that show what looks to be the coming Audi S4, due later this year. Revised bumpers, trunklid spoiler and qiad exhausts give away the goods on the variant, which like its predecessor will be powered by Audi's sublime 4.2-liter FSI V8. It'll also come with Audi's new understeer-reducing differential system that distributes engine torque in continuously variable proportions between the rear wheels. But don't get too keyed up; word is the next super-sport RS4 won't arrive until '09. [Motor Authority]